Truck-frame.



V. M. UMMA.

TRUCK FRAME. APPLICATION FILED 0019,1907.

1,009,112. Patentd Nov. 21, 1911.

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TRUCK FRAME. v APPLICATION FILED 00T.9,1907.

Patented Nov. 21, 1911.

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UNITED STAWENT n VICTOR M. SUMMA, OF ST. LOUIS, MISSOURI, ASSIGNOR TO WOLFE TRUCK FRAME COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF MAINE.

TRUCK-FRAME.

Specification of Letters Patent.

Patented Nov. 21, 1911.

Application filed October 9, 1907. Serial No. 396,649.

T 0 all whom it may concern:

Be it known that I, VICTOR M. SUMMA, a citizen of the United States, residing at St. Louis, State of Missouri, have invented certain new and useful Improvements in Truck- Frames, of which the following is a specification. 1

The object of my invention is to provide a truck frame of superior strength and having a convenient arrangement of the component parts.

Referring to the drawingsFigure 1 is a side View of my improved truck frame, portions thereof being shown in section to indicate the structure more clearly. Fig. 2 is a plan View. Fig. 3 is a section on the line 3, 3 in Fig.1. Fig. 1 is a section in the line 4, 4: in Fig. 1. Fig. 5 is a section on the line 5, 5 in Fig. 1. Fig. 6 is a section on the line 6, 6 in Fig. 2, and Fig. 7 is an ele vation of a detail modification.

The truck frame comprises the two side frames 15 and the two transverse connecting members 21, 22. Each side frame 15 has a trussed shape, as shown in Fig. 1, with seat-s 16 at the ends to which the journal boxes may be attached. At the center of each frame is an opening 17 to receive an end of the bolster. This opening is bounded at its top and bottom by the usual top and bottom arch bars, and at its upper part on each side by the column guides 18. The opening is wider below, being bounded by the walls 19. At the bottom of the opening the bottom arch bar is widened out to form the bolster spring seat 23.

The transverse connecting members are preferably channel beams, each having its web 21 vertical and itsflanges 22 directed toward the opposite channel beam. These two channel beams are riveted in the extensions 20 of the bolster opening 17, the said extensions being of such a size that the channel webs 21 may be riveted to the walls 19, and yet the flanges 22 will not project into the bolster opening 17.

Instead of the regular channel beams of uniform section throughout, I may employ modified channel beams such as illustrated in Fig. 7. In this form the whole intermediate portion of the beam is narrowed so that it shall not extend down as low as the end portions, which fit the extensions 20 of the bolster opening 17. The object of shaping the transverse connecting beams as in Fig. 7 is to make room underneath them for the brake beams.

The extensions 20 of the opening 17 for the bolster end serve to accommodate the ends of the channel beams 21, 22. A further advantage of these extensions is that the end of the bolster can be introduced into the wider bottom part of the opening 17 and then slipped up until the flanges on the end of the bolster embrace the column guides 18. Then the bolster spring can be inserted below the end of the bolster on the spring seat 23. When it is desired to remove the bol ster, it can be slipped down into the wider part of the opening 17 and withdrawn.

In the ordinary arch bar type of truck, prior to my invention, thechannel spring plank is connected to the bottom arch bar. The top arch bar is held to the bottom one by means of a malleable or cast iron column through which the column bolt passes, tying all of the parts together. The springs are placed on top of the channel spring plank, before referred to, and the bolster rests on top of the springs. All of the shock from the bolster to the truck frame, which in this case is, as described, built up of arch bars and columns, is transmitted to a point con siderably above the channel spring plank, the column acting as a cantaliver beam with the load at the end of the beam. But with the construction I have shown the tie beams, which take the place of the channel spring plank, are so located that the thrust of the bolster is taken care of by the two side beams, which are securely riveted to the frame instead of the column post itself having to do all of the work. Another good feature of this form of construction is that these channel beams can be so formed as to enable the brake beams to be hung at any height from the rail without any interference, as they can pass beneath the beams. This is one of the great difficulties with the channel or angle construction now employed. It is frequently necessary to increase the length of the wheel base in order to provide suflicient clearance in back of the brake beams and spring planks.

This type of truck frame gives great strength for the amount of material employed in its construction and is very conveniently arranged. It makes room for the brake beams, especially if the transverse members have the shape shown in Fig. 7,

and it facilitates the introduction and withdrawal of the bolster.

What I claim is:

1. In a car truck, two side frames each provided with a bolster opening wider at 1ts lower part, and transverse connecting beams having their intermediate parts of less depth than their ends, said beams being secured to the sides of the widened parts of the bolster openings.

2. In a car truck, a bolster, side frames provided with openings to receive the ends of the bolster, and channel beams connected at their ends to the sides of said openings and having their Webs in vertical planes, said channel beams being of less depth in their central portion than at the ends.

3. In a car truck, a bolster, side frames provided with openings to receive the ends of the bolster, and channel beams connected at their ends to the sides of said openings and having their webs in vertical planes, said channel beams having a comparatively narrow central portion and flaring outwardly and downwardly at the ends.

4. In a car truck, two side frames each having an opening to receive an end of the bolster, each of said openings belng widened at the bottom, and two transverse channel beams having their webs vertical and attached at their ends in the widened parts of the said openings.

5. In a car truck, a bolster, side frames provided with openings to receive the ends of the bolster, the lower part of said openings being widened, and channel bars connected at their ends to the sides of the widened parts of said openings, the webs of said channel bars being in substantially vertical planes.

6. In a car truck, a bolster, side frames provided with openings to receive the ends of the bolster, the lower part of said openings being widened, and channel bars connected at their ends to the sides of the widened parts of said openings, the webs of I said channel bars being in substantially vertical planes, and the central portions of sald 1 channel bars b6111 comparatively narrow in cross section and flaring outwardly and downwardly at the ends.

VICTOR M. SUMMA.

Witnesses:

HERBERT W. Wonrr, G. P. BUNDLE.

Copies of this patent may be obtained for five centseach, by addressing the Commissioner of Patents. Washington, D. G. 

